// 
// Entify project
//  
// Author:
//       Lauri Taimila <lauri@taimila.com>
// 
// Copyright (c) 2010 Lauri Taimila
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System;
using Mono.Data.Sqlite;

namespace Taimila.Entify.Sqlite
{
	/// <summary>
	/// Creates backend objects with SQLite implementation.
	/// </summary>
	internal class SqliteFactory : IPersistentFactory
	{
		/// <summary>
		/// SqliteConnection that is used by all objects created from this factory.
		/// </summary>
		private SqliteConnection connection;
		
		/// <summary>
		/// Sqlite type coordinator.
		/// </summary>
		private SqliteTypeCoordinator typeCoordinator;
		
		/// <summary>
		/// Sqlite persistent store.
		/// </summary>
		private SqlitePersistentStore persistentStore;
		
		/// <summary>
		/// Create SqliteFactory. 
		/// </summary>
		/// <param name="connectionString">
		/// Sqlite connection string for Sqlite connection. <see cref="System.String"/>
		/// </param>
		public SqliteFactory(string connectionString)
		{
			this.connection = new SqliteConnection(connectionString);
			this.connection.Open();
		}
	
		/// <summary>
		/// Get type coordinator for SQLite backend. This method returns always
		/// the same instace.
		/// </summary>
		/// <returns>
		/// TypeCoordinator for SQLite backend. <see cref="ITypeCoordinator"/>
		/// </returns>
		public ITypeCoordinator CreateTypeCoordinator()
		{
			if(this.typeCoordinator == null)
			{
				this.typeCoordinator = new SqliteTypeCoordinator(this.connection);	
			}
			
			return this.typeCoordinator;
		}
		
		/// <summary>
		/// Get persistent store for SQLite backend. This method returns always
		/// the same instace.
		/// </summary>
		/// <returns>
		/// PersistentStore for SQLite backend. <see cref="IPersistentStore"/>
		/// </returns>
		public IPersistentStore CreatePersistentStore()
		{
			if(this.persistentStore == null)
			{
				this.persistentStore = new SqlitePersistentStore(this.connection);	
			}
			
			return this.persistentStore;
		}
	}
}
